No

you don't need a jacket based on the weather in Bronx, NY, USA 4 minutes ago

73°F23°C & Partly Cloudy

Wind is 9 mph14 km/h from the South, gusting to 13 mph21 km/h
May 12
2pm73°F23°C9 mph14 km/h SouthMostly Clear
3pm74°F23°C9 mph14 km/h SouthMostly Clear
4pm74°F23°C9 mph14 km/h SouthMostly Cloudy
5pm73°F23°C8 mph13 km/h SouthMostly Cloudy
6pm72°F22°C8 mph13 km/h SouthCloudy
7pm69°F20°C8 mph12 km/h SouthPartly Cloudy
8pm65°F19°C7 mph11 km/h SouthMostly Cloudy
9pm63°F17°C5 mph9 km/h SouthMostly Cloudy
10pm62°F17°C4 mph7 km/h SouthMostly Cloudy
11pm61°F16°C4 mph6 km/h SouthMostly Cloudy
May 13
12am61°F16°C4 mph6 km/h SouthMostly Cloudy
1am60°F16°C4 mph6 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
May 1251°F10°C74°F23°C7 mph11 km/h from SouthPartly CloudyMostly Cloudy
May 1358°F15°C70°F21°C6 mph10 km/h from SoutheastDrizzleDrizzle
May 1458°F14°C66°F19°C11 mph17 km/h from EastRainRain
May 1559°F15°C73°F23°C5 mph7 km/h from EastDrizzleMostly Cloudy
May 1660°F16°C75°F24°C5 mph8 km/h from SouthDrizzleDrizzle
May 1760°F16°C76°F24°C7 mph11 km/h from SoutheastMostly CloudyDrizzle
May 1861°F16°C78°F25°C9 mph14 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 58°F15°C, High of 70°F21°C
Wind: 6 mph10 km/h
Precipitation: 66% rain

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